AgTe2Tm
AgTe2Tm is a semiconducting ternary telluride compound being investigated for its potential utility in phase-change memory devices.
About AgTe2Tm
AgTe2Tm is a complex ternary telluride belonging to the class of phase-change memory materials. As a semiconducting compound, it exhibits electronic properties that make it a subject of interest for high-density, non-volatile memory architectures where rapid switching between structural states is required.
Due to its near-hull thermodynamic stability, this material is considered a viable candidate for experimental synthesis and integration into device prototypes. Its structural versatility, evidenced by multiple reported configurations, suggests a flexible lattice capable of supporting the reversible phase transitions essential for modern memory technologies.
Key Properties
Cross-validated computational properties for AgTe2Tm, aggregated across 3 databases.
Band GapEnergy needed to move an electron from the valence band to the conduction band. Lower or zero values tend to behave more metallic; larger gaps are more insulating or semiconducting.
Energy Above HullThermodynamic distance from the most stable set of competing phases. 0 eV/atom is on the convex hull; small positive values may still be experimentally accessible.
StabilityA plain-language summary of the best reported energy-above-hull result. It reflects whether the lowest-energy structure is on, near, or far from the stability hull.
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
Reported Structures
Lowest-energy structures reported for AgTe2Tm, ranked by energy above hull.
| Space GroupSymmetry classification of the crystal arrangement. The number is the international space-group index. | Crystal SystemBroad lattice family, such as cubic, tetragonal, monoclinic, or triclinic, derived from unit-cell symmetry. | Band Gap (eV)Electronic gap calculated for this specific reported structure, measured in electronvolts. | E above hull (eV/atom)Thermodynamic distance from the convex hull for this structure, normalized per atom. Lower is generally more stable. | E/atom (eV)Computed total energy normalized per atom. Use energy above hull, not this value alone, when comparing stability. | Density (g/cm³)Mass per relaxed crystal volume, reported in grams per cubic centimeter. |
|---|---|---|---|---|---|
| P-421m (No. 113) | tetragonal | 0.85 | 0.0014 | -27.884 | 7.63 |
| P-3m1 (No. 164) | trigonal | 0.67 | 0.0141 | -27.871 | 7.81 |
| P3m1 (No. 156) | trigonal | 1.12 | 0.0214 | -27.864 | 6.96 |
| — | — | — | — | — | 7.64 |
| R-3m (No. 166) | — | — | — | — | — |
Applications
Where AgTe2Tm is used.
Frequently Asked Questions
Common questions about AgTe2Tm, answered from cross-validated data.
What is AgTe2Tm?
AgTe2Tm is a semiconducting ternary telluride compound being investigated for its potential utility in phase-change memory devices.
What is AgTe2Tm used for?
What is the band gap of AgTe2Tm?
Is AgTe2Tm a metal, semiconductor, or insulator?
Is AgTe2Tm thermodynamically stable?
What is the crystal structure of AgTe2Tm?
What is the density of AgTe2Tm?
How many polymorphs of AgTe2Tm are known?
What elements does AgTe2Tm contain?
Where does the data for AgTe2Tm come from?
How It Compares
Within the phase-change memory materials class.
Within the broader landscape of phase-change materials like the ubiquitous Ge2Sb2Te5 or the simpler AgTe, AgTe2Tm occupies a specialized niche by incorporating rare-earth thulium into the silver-telluride framework. While traditional binary systems like Ag2Te or Sb2Te3 serve as foundational benchmarks for phase-change behavior, the addition of thulium in AgTe2Tm provides a distinct chemical pathway to tune the electronic and structural characteristics of the material compared to established siblings such as AgSbTe2.
Related Compounds
Other Phase-Change Memory Materials in the database.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
- nomad — Data from NOMAD. Cite: Draxl & Scheffler, J. Phys. Mater. 2, 036001 (2019).
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